What’s Vulnerable › Vulnerabilities

CVE-2020-36884: BrightSign Digital Signage Diagnostic Web Server 8.2.26 Unauthenticated SSRF

• Severity: medium (CVSS 6.9 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-12-10 · updated 2026-06-17
• Weakness: CWE-918

Description

BrightSign Digital Signage Diagnostic Web Server 8.2.26 and less contains an unauthenticated server-side request forgery vulnerability in the 'url' GET parameter of the Download Speed Test service. Attackers can specify external domains to bypass firewalls and perform network enumeration by forcing the application to make arbitrary HTTP requests to internal network hosts.

Affected products

• BrightSign, LLC BrightSign Digital Signage Diagnostic Web Server: through 8.2.26

References

• https://github.com/zeroscience
• https://www.brightsign.biz
• https://www.exploit-db.com/exploits/48843
• https://www.vulncheck.com/advisories/brightsign-digital-signage-diagnostic-web-server-unauthenticated-ssrf
• https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5595.php
• https://www.exploit-db.com/exploits/48843
• https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5595.php

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